A company produces steel rods. The legnths of the steel rods are normally distributed with a mean of 154.9 cm and a standard deviation of 1.7cm. For shipment, 24 steel rods are bundled together. Find P21, which is the average length the smallest 21% bundles from the largest 79% bundles.

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: Given that,The random variable follows binomial distribution,n=6p=90%=0.9,q=1-p, q= 0.1

Q: A group of 30 students were sampled and measured their height. The average height was 168cm, with a…

A: Obtain the weight represents the 5th percentile. The weight represents the 5th percentile is…

Q: Find the number of boys and the combined standard deviation

A: Given :  Our aim is to find the number of boys and combined standard deviation.

Q: A certain brand of automobile tire has a mean life span of 31,000 miles and a standard deviation of…

A: Given Mean=31000 Standard deviation=2250

Q: During 1 week, an overnight delivery company found that the weights of its parcels were normally…

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.5 inches and a…

A: 69.5 2.62 64.4 2.53 American woman:

Q: In an agricultural study, the average amount of corn yield is normally distributed with a mean of…

A: Given :- In an agricultural study, the average amount of corn yield is normally distributed with a…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: Givenmean(μ)=1252standard deviation(σ)=129

Q: A highway study of 8000 vehicles that passed by a checkpoint found that their speeds were normally…

A: Answer - A highway study of  N = 8000 vehicles that passed by a checkpoint found that their…

Q: The sizes of houses in Kenton County are normally distributed with a mean of 1369 square feet with a…

A: From the given information, the mean and standard deviation are 1,369 and 171.

Q: A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard deviation of…

A: Given, A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard…

Q: The average time it takes a certain brand of ibuprofen to start working is 25 minutes, with a…

A: Given Information :  The average time it takes a certain brand of ibuprofen to start working is 25…

Q: The length of time it takes a Grade 11 student to play the Candy Crush computer app follows a normal…

A: Given that  The length of time it takes a grade 11student to play the candy crush computer is…

Q: A livestock company reports that the mean weight of a group of young steers is 1142 pounds with a…

A: Let X be a random variable such that X: Weight of a young steer X~N1142, 792 a) The probability of…

Q: in city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation of 3.0…

A: Let X be hight of Man from normal distribution with mean (μ) = 69.4, standard deviation (σ) = 3.0…

Q: When Lauren runs the 400 meter dash, her finishing times are normally distributed with a mean of 88…

A:

Q: Many families in California are using backyard structures for home offices, art studios, andhobby…

A: Let us consider X be a random variable which denotes the cost of shingled backyard structure which…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A:

Q: Rashid is 84 inches tall. If the height of males in the United States is nor- mally distributed with…

A: Height of Rashid = x = 84 inches. Mean =  70 Standard deviation = 4 The z-score is given by z-score…

Q: A manufacturer claims that the mean lifetime of its lithium batteries is 1400 hours. A homeowner…

A: Given, Claim: A manufacturer claims that the mean lifetime pf its lithium batteries is 1400 hours.…

Q: Jeffrey, as an eight-year-old, established a mean time of 16.43 seconds for swimming the 25-yard…

A: Given n=15 x=16σ=0.8μ=16.43α=0.05

Q: During 1 week, an overnight delivery company found that the weights of its parcels were normally…

A: A normal distribution is called a standard distribution if; 1. 68% of the values of the random…

Q: The weights of bags of baby carrots are normally distributed, with a mean of 31 ounces and a…

A: Solution: Let X be the weight of bag of baby carrots. From the given information, X follows normal…

Q: All the houses in Stanton county have a mean size of 1650 square feet with a standard deviation of…

A:

Q: when designing aircraft cabins, what ceiling height will alow 98% of men to stand without bumping…

A:

Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…

A: Given information- Population mean, µ = 67 inches Population standard deviation, σ = 3 inches We…

Q: The weights of oranges in a harvest are normally distributed, with a mean weight of 150 grams and…

A: From the provided information, Mean (µ) = 150 Standard deviation (σ) = 10 Let X be a random variable…

Q: In a recent survey, 80% of the community favored building a police substation in their neighborhood.…

A:

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A: As we are entitled to solve one question at a time I will answer 2nd one as some information is…

Q: The state of California has a mean annual rainfall of 22 inches, whereas the state of New York has a…

A: Given: For California: Mean,μ=22Std deviation,σ=4Sample size, n=30 For New York: Mean,μ=42Std…

Q: A popcorn company find that their 1kg bags have a mean of 985 grams with a standard deviation of 24…

A:

Q: Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or higher on the…

A: Given: Sample mean x¯=30.15 Sample standard deviation (s) =  12 Sample size (n) = 59 Hypothesized…

Q: The heights of adult men in America are normally distributed, with a mean of 69.1 inches and a…

A: Heights of adult men is Normally Distributed with mean 69.1 inches and standard deviation 2.68…

Q: The heights of adult men in America are normally distributed, with a mean of 69.3 inches and a…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A second species of extra-terrestrial has a mean height of 71cm and a standard deviation of 5.3cm.…

A:

Q: A company produces different types of drinks. It has been observed that the amount of drink in a…

A: Given,meanμ=500standard deviationσ=4.75

Q: A certain brand of automobile tire has a mean life span of 32,000 miles and a standard deviation of…

A: Given Information:  Mean (u) = 32000 miles Standard deviation (s) = 2050 miles

Q: The weights of bags of baby carrots are normally​ distributed, with a mean of 32 ounces and a…

A: Here, µ = 32 and σ = 0.37.

Q: An agronomist measured the height of 134 canola plants. The mean height was 214 cm and the standard…

A:

Q: The number of text messages that teenagers send per month is normally distributed with a mean of…

A: We have given that  X~N(mu,sigma ^2) mu=3400,sigma =450 and X=4415 Z-socre =(X-mu)/sigma

Q: The weights of bags of baby carrots are normally​ distributed, with a mean of 31 ounces and a…

A: From the provided information, Mean (µ) = 31 Standard deviation (σ) = 0.34 X~N (31, 0.34)

Q: A mountain climber plans to buy some ropes to use as a lifeline. Which of the following would be a…

A: Given, Rope A:  Mean breaking strength = 500 LBS         Standard deviation = 100 LBS   Rope B: Mean…

Q: The heights of 82 roller coasters have a mean of 280.7 feet and a population standard deviation of…

A: Given data normally distributed with mean of 280.7 feet, population standard deviation 59.3 feet and…

Q: Jeffrey, as an eight-year old, established a mean time of 16.43 seconds for swimming the 25-yard…

A: Population mean = ? = 16.43 Population S.D = ? =0.8 Sample size = n =15 Sample mean = x̅ = 16

Q: One researcher collected a sample of expenses for advertisement from 5 companies as follows: 50, 60,…

A:

Q: deviation of 2,250 miles.​ (Assume the life spans of the tires have a​ bell-shaped distribution.)…

A:

Q: The mean height of male college students in a large city is 68 inches and the standard deviation is…

A: Answer:----.                       Date:----10/10/2021

Q: A certain brand of automobile tire has a mean life span of 37,000 miles and a standard deviation of…

A: mean = 37000 standard deviation = 2400

Q: In a study of Ridge View's boys' basketball team, the average height is 68 inches and standard…

A: Given that, In a study of Ridge view's boys' basketball team, the average height is 68 inches and…

Q: A certain brand of automobile tire has a mean life span of 37,000 miles and a standard deviation of…

A: Let X be the lifespan that follows normal distribution with mean μ = 37,000 miles and standard…